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Javascript Developer Jobs in Marcus Hook, PA, US
220+ javascript developer jobs from 96 companies hiring in Marcus Hook, PA, US.
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SDET Engineer
Philadelphia, Pennsylvania, United States
$72k-$130k/yr OnsiteFull Time
2+ YOEBachelor's degree plus 2 years' related experience or equivalent; 2-4 years in development languages and automation tools; Agile, end-to-end testing, problem solving, analytics; 18+ and authorized to work in the US.
TypeScript, JavaScript, Python, Java, Cypress, Selenium, TestNG, Appium, Sauce Labs, Rest Assured, Postman, Cucumber, Jasmine, Protractor
2w
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Software Engineer - Level III
Aberdeen Proving Grounds, Maryland, United States
$108k-$162k/yr OnsiteFull Time
5+ YOESecurity clearance required; US citizenship; multiple education paths with experience; strong web development skills.
HTML, CSS, JavaScript, Python, PHP, SQL, Photoshop, Dreamweaver
1mo
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Software Engineer (Backend/APIs)
Reading, Pennsylvania, United States
OnsiteFull Time
3+ YOEApproximately 3 years of software development experience; C# / .NET; SQL basics; strong collaboration and willingness to learn.
C#, .NET, SQL, REST API, HTML, CSS, JavaScript
2mo
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Senior Software Engineer – Cloud & Full Stack
Wilmington or Columbus
$81k-$114k/yr OnsiteFull Time
6+ YOE6+ years of experience; expert in AWS, SQL, React Native, Spring Boot, Java, JavaScript, and MySQL; onsite in Wilmington, DE or Columbus, OH; visa transfer/sponsorship not offered.
AWS, Java, JavaScript, React Native, Spring Boot, SQL, MySQL, Microservices
1w
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Full Stack Palantir Foundry Developer
Arlington or Seattle or Denver or Chicago or Ridley Park or El Segundo or Saint Louis or Seattle
$149k-$215k/yr HybridFull Time
5+ YOEFull stack software development with 5+ years experience; React/TypeScript; Python/PySpark; ontology/taxonomy development; Foundry experience preferred.
ReactJS, Redux, JavaScript, TypeScript, Python, PySpark, REST, Git, S3/Parquet
1mo
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Digital Content Developer
West Chester, Pennsylvania, United States
OnsiteFull Time
Technical Lead for digital content development; strong HTML/CSS/JavaScript, AEM/CMS, Adobe Target; able to coordinate with UX/IT; 24-hour on-call; Wednesday-Saturday, 3pm-1am.
AEM, CMS, HTML, CSS, JavaScript, JSON, Adobe Target, JQuery, PHP, JSP
1w
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Software Engineer - Federal Geospatial (Hub-Remote: DC or Philly Metro)
Alexandria or Philadelphia
$105k-$141k/yr RemoteFull Time
Element 84: Builds cloud-native geospatial software and data processing pipelines.
5+ YOE5+ years software engineering; full-stack Python/JavaScript; Clojure; React; AWS S3/IAM/Lambda; NOAA CAC badge; remote Scrum; BS in technical field.
Python, JavaScript, Clojure, React, AWS, S3, IAM, Lambda, Node.js, MacOS X
2w
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Associate Software Engineer
King of Prussia, Pennsylvania, United States
RemoteFull Time
1+ YOEAssociate’s degree in CS/IS required; related Bachelor’s preferred; 1+ years programming/web development; HTML/JS/CSS required; SQL or similar a plus; strong English.
Cerner Discern Visual Developer, Komodo, Notepad++, HTML, JavaScript, CSS, SQL
3mo
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Software Developer
Philadelphia, Pennsylvania, United States
HybridFull Time
Bachelor’s degree or equivalent in a technical field; experience with Core Java or .NET; knowledge of frameworks and cloud services; strong problem solving and collaboration skills.
Java, C#/.NET, Spring Framework, J2EE, REST, API, Jenkins, Docker, Kubernetes, AWS, Azure, SQL, NoSQL, Cosmos DB, Data Factory, Event Hubs, Git, Maven, NUnit, SageMaker, Spark, Swagger, OData, EJB, Angular, React, Vue.js, HTML, CSS, JavaScript
2mo
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Senior Software Engineer, Platform
Philadelphia or New York
$116k-$209k/yr OnsiteFull Time
4+ YOEDevelop and optimize platform services; cloud focus; Agile; automation; 4-7 years platform experience; AWS preferred.
AWS, Kubernetes, Go, Java, Scala, Python, JavaScript
2w
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Senior SharePoint Developer (King of Prussia, PA, US, 19406)
King of Prussia, Pennsylvania, United States
$101k-$164k/yr OnsiteFull Time
8+ YOE8+ years in SharePoint development; BA/BS required; design, develop, deploy SharePoint/M365 solutions; on-prem and cloud; mentor junior staff.
SharePoint 2016, SharePoint Subscription Edition, SharePoint Online, SPFx, C#, NET, JavaScript, TypeScript, React, HTML5, CSS3, PowerShell, Power Platform, Power Automate, Power Apps, Power BI, Microsoft Graph API, REST APIs, CSOM, GitHub
2mo
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Staff Software Engineer (Secret) {S}
King of Prussia, Pennsylvania, United States
HybridFull Time
5+ YOEBachelor's in CS or related field; 5+ years Java/C#/Python; 1+ year JavaScript/TypeScript; in-office 3+ days/week with potential for more; experience with Java, Spring Boot or Quarkus; SDLC, microservices, RESTful APIs; Agile/Scrum; active Secret U.S. Government security clearance.
Java, C#, Python, JavaScript, TypeScript, Spring Boot, Quarkus, REST, AWS, Azure, Kubernetes
2w
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PCS Retirement, LLC - QA Automation Engineer (Hybrid - Philadelphia)
Philadelphia, Pennsylvania, United States
$85k-$110k/yr HybridFull Time
5+ YOE5+ years in software automation testing; strong programming (SQL, JavaScript, HTML, JSON, CSS); experience with mabl/Selenium; Agile environment; knowledge of Vue.js, Azure DevOps; hybrid schedule in Philadelphia.
mabl, Selenium, Postman, JMeter, SQL, JavaScript, HTML, JSON, CSS, Vue.js, Azure DevOps
1mo
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Senior Lead Software Engineer - Contact Center (CCaaS)
Wilmington, Delaware, United States
OnsiteFull Time
5+ YOE5+ years software engineering; experience with Amazon Connect and AWS; Python/Node.js/JavaScript; CI/CD; Omnichannel; CRM integrations; BS in CS/IT/Math; 10+ years IT preferred
Python, Node.js, JavaScript, CI/CD, CloudFormation, Terraform, Amazon Connect, AWS
2mo
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Senior Software Developer (Secret Clearance Required)
Aberdeen, Maryland, United States
HybridFull Time
3+ YOEDoD security clearance, 3-5+ years in software development, strong Android/Java/C/C++, DevOps tools, Linux, APIs, Docker, Kubernetes, cloud, Agile.
Git, Gitlab, Jira, Nexus, Artifactory, Gradle, Bash, Python, Docker, Kubernetes, Linux, Android, Java, JavaScript, C, C++, C#, APIs, NVIDIA CUDA, ElasticSearch, Kibana
3w
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Software Engineer-Mobile Development (Android)
Philadelphia, Pennsylvania, United States
$65k-$80k/yr OnsiteFull Time
5+ YOEStrong proficiency in React Native with Android focus; solid Android fundamentals; experience with Android Studio, Gradle, Android SDK; Java/Kotlin/JavaScript/TypeScript; REST APIs; Git; AWS; SQL databases; automated tests; team collaboration.
React Native, Java, Kotlin, Android Studio, Gradle, Retrofit, Room, WorkManager, Google Play Console, AWS, Git, SQL, PostgreSQL, Oracle, MSSQL, Node.js, .NET Core, PHP, Docker, CI/CD, API design and development
1w
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Front-End Engineer (Healthcare Consulting)
Philadelphia, Pennsylvania, United States
$96k-$140k/yr HybridFull Time
3+ YOE3+ years of front-end development with React; knowledge of back-end/API operations; healthcare or regulated industry experience preferred.
React, JavaScript, Python, HTML, CSS, Tailwind, Redux, Zustand, Vite, Webpack, Jest, React Testing Library, Playwright, GitHub Actions, CI/CD, Node.js, NPM, Yarn, PNPM, CSS Modules
2mo
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Technical Architect, Full Stack Developer
King of Prussia, Pennsylvania, United States
$175k/yr OnsiteFull Time
10+ YOE10+ years of software development/architectural experience; Salesforce expertise; strong integration, data, and system design skills; leadership and mentoring abilities.
Salesforce.com, Zuora, ServiceMax, FinancialForce, CPQ, Apex, Lightning Web Components, Visualforce, Boomi, MuleSoft, Jitterbit, SQL, ETL, Data Loader, Force.com, Java, JavaScript, XML, SAML, SSO, OAuth, APIs
3w
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Software Applications Engineer
Aberdeen Proving Ground, Maryland, United States
HybridFull Time
5+ YOEDoD Secret clearance; Bachelors in computer/science-related field; 5+ years in software applications engineering; .NET full-stack with C#, MudBlazor, HTML/CSS/JS; Azure/DevOps; API development; security models; hybrid role near Aberdeen Proving Ground, MD.
C#, dotnet, Blazor, MudBlazor, HTML, CSS, JavaScript, Razor, Entity Framework, SQL, Azure, DevOps, OpenID Connect, OAuth 2.0, Microsoft Entra ID, Git
1w
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Senior Quality Test Engineer II
Philadelphia, Pennsylvania, United States
$87k-$144k/yr OnsiteFull Time
Automated QA engineer with JavaScript/TypeScript, Webdriver.io or Playwright, API testing, CI/CD, and accessibility/performance testing.
Webdriver.io, Playwright, RESTful API testing, Cucumber, Jenkins, GitHub Actions, BrowserStack, Axe, Pa11y, WAVE, K6, Locust, JMeter
4d
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Optimization Tech Debt Engineer (Engineer Software 2) - 27217 (Aberdeen Proving Ground, MD, Remote, United States)
Aberdeen Proving Ground, Maryland, United States
$78k-$90k/yr RemoteFull Time
2+ YOE2 years experience with Bachelors in related field; 0 years with Masters; or HS diploma with 6 years relevant experience; Linux, Agile, Java/JavaScript, Node.js, React.js, C++/C#, Visual Studio; active Secret Clearance.
Java, JavaScript, Node.js, React.js, C++, C#, Linux, Confluence, Jira, Git, Visual Studio
1mo
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Fullstack Software Engineer (C# / Vue.js)
Wilmington, Delaware, United States
HybridFull Time
2+ YOE2–5 years of full-stack web development experience with C#, .NET, Vue.js; strong SQL Server; REST, MVC; Git; Agile practices.
C#, NET, ASP.NET, REST APIs, Vue.js, SQL Server, Entity Framework, Git, CI/CD, JavaScript, HTML, CSS, MVC, ASP
3w
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Quality Test Engineer III
Philadelphia, Pennsylvania, United States
$72k-$119k/yr OnsiteFull Time
Design, develop, and maintain automated test frameworks; RESTful API testing; CI/CD integration; accessibility, performance testing; JS/TS expertise.
Webdriver.io, Playwright, JavaScript, TypeScript, RESTful API testing, Cucumber, Gherkin, Jenkins, GitHub Actions, BrowserStack, Axe, Pa11y, WAVE, K6, Locust, JMeter
2mo
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Principal Software Engineer - 90402969 - Onsite - Washington DC, Wilmington, Philadelphia (Washington, DC, US, 20001)
Washington or Wilmington or Philadelphia
$125k-$161k/yr OnsiteFull Time
7+ YOEBachelor's degree or equivalent; 7+ years experience; onsite 4-5 days; strong Java/JavaScript/TypeScript/SQL; Angular/React; Spring/SpringBoot; REST; cloud; data streaming
Java, JavaScript, TypeScript, SQL, Angular, React, Node.js, Spring, SpringBoot, REST, Cloud, Data streaming, Version control
1mo
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Intern, Marketing Developer
Harrisburg or Mount Laurel or Philadelphia
HybridInternship
Some College coursework; coding ability in at least one language; attention to detail; ability to multitask; good communication; curiosity about work.
HTML, CSS, JavaScript
3w
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Software Engineer
Doylestown, Pennsylvania, United States
OnsiteFull Time
2+ YOEU.S. citizen with DoD Secret clearance eligible; Associate’s degree in computer science/IT/mathematics or scientific field; 2+ years of production programming in .NET, Java, or C/C++
NET, Java, C/C++, Azure DevOps, Blazor/Razor, Git, Visual Studio, JavaScript
1mo
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Software Engineer
Philadelphia, Pennsylvania, United States
$80k-$88k/yr HybridFull Time
1+ YOESoftware Engineer with 1-3 years of experience, BS in MIS/CS/Engineering, strong communication, hybrid work in Philadelphia.
Cloud platforms, Databricks, PySpark, CI/CD, Docker, Terraform, LangChain, Python, Java, SQL, JavaScript, .NET, React, Angular, Azure OpenAI, AWS Bedrock
2mo
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Software Engineer - Full Stack (Associate level) (Philadelphia, PA, US, 19106)
Philadelphia, Pennsylvania, United States
OnsiteFull Time
4+ YOE4+ years software engineering; full stack with AWS, Python, SQL; UI development; cloud and data pipelines; Bachelor’s in CS/CE.
AWS, S3, Redshift, Lambda, Airflow, Docker, Jenkins, REST APIs, Python, SQL, React, AngularJS, ReactJS, DJANGO, XML, CSS, HTML, JavaScript
1mo
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Lead Software Engineer, Full Stack
Wilmington, Delaware, United States
$179k-$205k/yr OnsiteFull Time
4+ YOESenior full-stack software engineer with 4+ years of software development experience; cloud experience (AWS/Azure/GCP); leadership and mentoring skills.
JavaScript, Java, TypeScript, Python, Go, SQL, HTML/CSS, Docker, Kubernetes, AWS, Open Source Databases, NoSQL
2mo
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Intern | Product Developer – Prophet 21
Bensalem, Pennsylvania, United States
HybridInternship, Full Time
Internship requiring basic programming knowledge, version control familiarity, and strong analytical skills.
C#, Java, Python, JavaScript, Git
1w
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QA Engineer
Maple Shade, New Jersey, United States
RemoteFull Time
4+ YOE4+ years software QA experience, 2+ years test automation; proficiency with TestComplete/Playwright; programming in Java, Python, or JavaScript; CI/CD tooling; BS in CS or related field.
TestComplete, Playwright, Java, Python, JavaScript, Azure DevOps, GitHub, GitLab
3w
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Web Test Engineer
Aberdeen Proving Ground, Maryland, United States
RemoteFull Time
3+ YOE3+ years software testing and automation; automated web testing with Cypress/Selenium; Agile/Scrum experience; CI/CD familiarity; containerization with Docker/Kubernetes; strong troubleshooting.
Cypress, Selenium, TestNG, JUnit, Postman, REST Assured, SoapUI, GitLab CI, Docker, Kubernetes, Maven, Gradle, NPM, JMeter, Java, JavaScript, Cucumber, Gherkin, SQL, Git
3w
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Staff Software Engineer- Python
Oaks, Pennsylvania, United States
OnsiteFull Time
8+ YOE8+ years OOP with Python; 8+ years SQL; 8+ years Git; Bachelor's; skilled in JS/TS/React/Node/Python; cloud (AWS/Azure/GCP); Docker; security basics.
JavaScript, TypeScript, React, Node, Python, Flask, AWS, Azure, GCP, Pulumi, Terraform, Docker, TCP/IP
4w
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Principal Software Engineer - Calypso
Iselin or Pittsburgh or Dallas or Phoenix
$128k-$191k/yr HybridFull Time
7+ YOE7+ years in Calypso/financial services; leadership; strong Java/J2EE, WebSphere, SpringBoot; experience with OTC derivatives; cloud and DevOps tooling; excellent communication.
Websphere, Java, SpringBoot, MQ, ETL, API development, UNIX, Oracle SQL, PostgreSQL, Linux, JavaScript, HTML, Python, Angular, Unix shell scripts, AWS, Bitbucket, Nexus, Jenkins, Terraform, NoSQL, Lucene, Memcache, RabbitMQ
1mo
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Lead, Software Engineer - Salesforce
Newark or Portland or Fort Washington or Washington Street, Newark
$134k-$220k/yr OnsiteFull Time
Lead Software Engineer - Salesforce with strong DevOps, security, and Salesforce expertise; proficient in Python/Java/JS; agile, collaborative leader.
Salesforce, Python, Java, JavaScript, React, Spring Boot, Node.js
1w
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Senior Software Engineer, Backend
Philadelphia, Pennsylvania, United States
$160k-$210k/yr OnsiteFull Time
5+ YOE5+ years web apps; 2+ years leading teams; PostgreSQL; AWS; Docker/Kubernetes; Python/Django or Rails; strong communication.
JavaScript, Python, Django, Flask, React, React Native, Redux, Kubernetes, AWS, Docker, Celery, Redis, Datadog, CloudWatch
2mo
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Full Stack Developer
Aberdeen, Maryland, United States
$108k-$228k/yr OnsiteFull Time
5+ YOEBachelor's degree or equivalent experience; 5+ years in full stack development; strong Java, front-end, and database skills; cloud and container tech a plus; Secret clearance (minimum).
Java, Spring Boot, Vaadin, Jakarta EE, HTML, CSS, JavaScript, React, Angular, Vue.js, SQL, MySQL, PostgreSQL, MongoDB, Git, AWS, Azure, Google Cloud, Docker, Kubernetes, CI/CD
7h
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Sr. Customer Engineer, Enterprise
New York or Stamford or Jersey City or Philadelphia or Remote
$193k-$242k/yr RemoteFull Time
5+ YOE5-8 years in a customer-facing technical role; strong web tech (HTML, CSS, JavaScript, REST APIs); experience with enterprise accounts; AI-enabled workflow experience; mentoring juniors.
HTML, CSS, JavaScript, REST APIs, AI tools
2mo
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GIS Solution Engineer - Geo Experience Center
Philadelphia or Charlotte or Denver or Louisville or Minneapolis or Olmypia or Redlands or San Antonio or St. Louis or Washington
$77k-$127k/yr OnsiteAll Commitments Available
2+ YOE2+ years with Esri tech, 1+ years in various industries; Python/JavaScript; ArcGIS IT context; travel 25-50%; bachelor’s degree; no visa sponsorship.
ArcGIS, Python, JavaScript, Cloud computing (Azure AWS), Geodatabases, Web services
1mo
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Senior Full Stack AI Engineer
Philadelphia, Pennsylvania, United States
$100k-$120k/yr HybridFull Time
3+ YOEBachelor's degree or equivalent; 3 years related experience; ability to lead and coordinate team activities; proficient with technology; ability to document and draft instructions; teamwork; strong communication; travel and on-call availability.
C#, ASP.NET, .NET Core, Entity Framework, JavaScript, TypeScript, HTML5, CSS3, React, Angular, SQL, NoSQL, Vector databases, Azure
HiringCafe market data
Javascript Developer Jobs market signals in Marcus Hook, PA, US
These signals come from live HiringCafe job inventory, not a static article. Use them to compare the market, then open listings above to apply directly.
Open jobs
220+
Hiring companies
96
Fresh sample
42% new in 30d
Salary visibility
66% show pay
Companies appearing in this market
T-MobileBoeingEsriJPMorgan ChaseCognizantElsevierRELXUniversal Health Services
Work location mix in visible results
Onsite: 38Hybrid: 22Remote: 7